// Copyright 2021 Datafuse Labs
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use databend_common_ast::ast::SetOperation;
use derive_visitor::VisitorMut;

#[derive(Debug, Clone, Default, VisitorMut)]
#[visitor(SetOperation(enter))]
pub struct CountSetOps {
    pub count: usize,
}

impl CountSetOps {
    pub fn enter_set_operation(&mut self, _set_operation: &SetOperation) {
        self.count += 1;
    }
}
